A Cu-based Cu8−xGe(S, Te)6 argyrodite: its widespan cubic-phase region and ultralow lattice thermal conductivity

Tsai, Yi-FenYi-FenTsaiStern, Charlotte L.Charlotte L.SternChen, Bo-ChiaBo-ChiaChenSnyder, G. JeffreyG. JeffreySnyderHSIN-JAY WU2024-09-182024-09-182023https://www.scopus.com/record/display.uri?eid=2-s2.0-85157966227&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/721144This work discloses a newly-discovered Cu8−xGe(S, Te)6 argyrodite stabilizing in a high-symmetry cubic phase in the entire low-to-mid temperature region (250-700 K). Partially substituting the sulfur with tellurium increases the configuration entropy, enabling the Cu8−xGe(S, Te)6 as a promising mid-entropy thermoelectric (TE) alloy with ultralow thermal conductivity. © 2023 The Royal Society of Chemistry.A Cu-based Cu8−xGe(S, Te)6 argyrodite: its widespan cubic-phase region and ultralow lattice thermal conductivityjournal article10.1039/d3ta01476b2-s2.0-85157966227